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Counties → Oregon

Clatsop County, Oregon

SDWIS compliance plate

Sheet OR007 · Clatsop County 31 sys · 5,305 viol · #1070/3254

VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-LOW 9.0% health
  • RANK-UPPER #1070/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 52%
  • SYS-SMALL 31 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Multnomah County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Clatsop County ranks #1,070 of 3,254 counties by people served, and #18 of 36 counties in Oregon. See methodology · corpus placement.

Clatsop County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 9.0% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,070 of 3,254 · #18 of 36 in Oregon.

Flagged-rate neighbourhood around Clatsop County

Lowest/highest poles plus in-state counties nearest Clatsop County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Polk · lowest Wheeler · highest Benton · near Coos · near 86.2% 100% 100% 100% 100% 100% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Astoria, City Of 10,181 44 Clean
Warrenton, City Of 9,100 137 Clean
Seaside Water Department 7,482 138 Clean
Youngs River Lewis & Clark WD 2,580 534 -
Knappa Water Association 1,800 15 -
Gearhart Water Department 1,780 23 -
Cannon Beach, City Of 1,710 79 -
Wickiup Water District 1,630 306 -
Georgia-Pacific, Wauna Mill 760 100 -
Olney-Walluski Water Assn 575 61 -
Westport Water Association 550 166 -
Oprd Bradley State Wayside 383 77 -
Burnside Water Association 350 26 -
John Day Water District 350 65 -
Willow Dale Water District 310 46 -
Fernhill Community Wtr System 300 42 -
Falcon Cove Beach WD 215 104 -
Arch Cape Water District 200 361 -
Jewell School District #8 200 320 -
Wauna Water District 188 716 -
Sunset Lake RV Park 170 223 -
Elderberry Nehalem WS 160 406 -
Camp Rilea 136 5 -
Odot Hd Sunset Springs Ra 125 42 -
Maple Elsie Water Service 100 578 -
Westport Heights 90 149 -
Cannon View Park Inc 75 81 -
Camp 18 69 5 -
Oneys Restaurant/Lounge 60 86 -
Odf Spruce Run Park Hp 40 76 -
Hamlet Quick-Stop 30 294 -

Compare beyond Oregon

Mid-flagged peers for Clatsop County

Cross-state counties nearest Clatsop County on flagged-system share (100.0%) and cumulative violation count (5,305). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.